Influence of Thermal Aging Parameters on the Characteristics of Aluminum Semi-Solid Alloys
| Autor: | Xiao Grant Chen, Mohamed Bouazara, Khaled Ahmed Ragab |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:TN1-997
Materials science Scanning electron microscope Alloy chemistry.chemical_element 02 engineering and technology Thermal treatment engineering.material mechanical properties 01 natural sciences Aluminium 0103 physical sciences aluminum semi solid alloys General Materials Science Composite material lcsh:Mining engineering. Metallurgy 010302 applied physics electrical conductivity Metals and Alloys technology industry and agriculture 021001 nanoscience & nanotechnology Microstructure equipment and supplies Cracking chemistry Transmission electron microscopy SEM engineering Hardening (metallurgy) TEM multiple thermal aging 0210 nano-technology |
| Zdroj: | Metals, Vol 8, Iss 10, p 746 (2018) Metals Volume 8 Issue 10 |
| ISSN: | 2075-4701 |
| Popis: | The current study aimed at analyzing the response of semisolid A357 aluminum alloys to unconventional thermal treatment cycles of T4/T6/T7 conditions. The mechanical, electrical, and microstructural characterizations of such semisolid alloys were investigated. The microstructure evolutions of Fe-intermetallic phases and strengthening precipitates were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The mechanical failure of such semi solid A357 aluminum alloys, used for suspension automotive parts, is mostly related to cracking issues which start from the surface due to hardness problems and propagate due to severe load variations. For these reasons, the multiple thermal aging cycles, in this study, are applied to enhance the mechanical properties and to have compromised values compared to those obtained by standard thermal treatments. The results obtained in this work indicate that the heat treatment of this alloy can be optimized. The results showed that the optimum characteristics of A357 semisolid alloys were obtained by applying thermal under-aging cycle, interrupted thermal aging cycles and a T7/T6 two steps aging treatment condition. The electrical conductivity and electron microscopy were applied in this study to analyze the characteristics of hardening phases formed due to different aging cycles applied to the alloys investigated. |
| Databáze: | OpenAIRE |
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